
CNC Machinist Calculator
Speed Feed RPM Milling
Free · In-App Purchases · Designed for iPad
New: Tolerance & Fits, G‑Code Library & Generators, Chip Load & Deflection with chatter risk — all offline, all production-ready.
Meet Milling • Drilling • Turning — the pocket‑sized industrial calculator trusted by CNC programmers, tool‑room veterans, and manufacturing engineers worldwide. In under a second, it turns scribbles on a setup sheet into exact spindle RPM, feed per tooth, horsepower draw, coolant flow, tolerances, and even G‑code patterns — no spreadsheets, no rules of thumb, no signal required.
16 production‑ready tools (offline)
• Milling Speed & Feed
• Milling Horsepower
• Milling Step‑over Distance
• Drilling Speed & Feed
• Drilling Horsepower
• Drill Size / Tap Drill Look‑up
• Tap Size (pitch & class)
• Turning Speed & Feed
• Turning Horsepower
• Turning Surface Roughness
• Thread Milling (helical path, arc length, chip thinning)
• Tool‑Life Predictor
• Coolant Flow & Nozzle Velocity
• NEW: Tolerance & Fit Calculator (ISO 286 / ANSI B4.1)
• NEW: G‑Code Reference Library & Quick Generators
• NEW: Chip Load & Tool Deflection Calculator
What’s new and why it matters
• Tolerance & Fit Calculator (ISO 286 / ANSI B4.1)
• Pick standard fits (e.g. H7/g6) and get upper/lower limits, deviations, and fit type (clearance/transition/interference) instantly.
• Visual tolerance zones help with assembly planning and inspection.
• Inch/metric aware, with save/share for traveler notes.
• G‑Code Reference & Quick Generators
• Clean, searchable G‑ and M‑code library with categories, formats, and examples you can copy to clipboard.
• Quick Generators: Bolt circle, rectangular and linear patterns, plus arc‑center from 3 points — perfect for one‑off ops and quick CAM notes.
• Chip Load & Tool Deflection Calculator
• Computes chip load per tooth, cutting forces, bending stress, overhang ratio, and tool deflection (µm & thou).
• Chatter risk score with visual indicators and actionable recommendations.
• Material‑aware defaults for tool and workpiece; supports carbide/HSS and common alloys.
Why machinists keep it on their home screen
• Built for the shop floor — big type, dark mode, glove‑friendly UI; works 100% offline.
• Verified formulas & data — derived from ISO, ASM Handbook, and Machinery’s Handbook; peer‑reviewed by veteran machinists.
• Inch/metric in one tap — instant unit swap, plus surface speed, chip‑load, and MRR summaries.
• Smart defaults — choose tool material and workpiece alloy to pre‑fill recommended SFM and fz.
• Save & share — bookmark setups, copy results to CAM notes, or AirDrop to the operator.
• Light on battery, heavy on accuracy — single‑screen calculators to keep you cutting, not tapping.
Built to boost OEE and quality
• Hit first‑article faster with fewer test cuts.
• Reduce scrap and rework through predictable feeds, speeds, and fits.
• Improve tool life with correct chip load and deflection control.
• Communicate clearly — standardized results you can paste into setup sheets.
Always improving
We ship practical, production‑ready tools that machinists actually use. If it doesn’t help you ship parts, it doesn’t ship in the app.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
This app has not received enough ratings or reviews to display an overview.
• New: Tolerance & Fit Calculator (ISO 286 / ANSI B4.1) with visual zones and fit classification
• New: G‑Code Reference Library with searchable G/M codes and copyable examples
• New: Quick Generators — bolt circle, rectangular and linear patterns, arc center from 3 points
• New: Chip Load & Tool Deflection Calculator — forces, deflection (µm & thou), overhang ratio, chatter risk with recommendations
• Plus UI refinements, faster unit switching, and minor fixes
The developer, Vladislav Zhirnov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Vladislav Zhirnov
- Size
- 10.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.6 or later.
- iPhone
Requires iOS 16.6 or later. - iPad
Requires iPadOS 16.6 or later. - Mac
Requires macOS 13.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- Languages
English and 31 more
- English, Arabic, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Full version / year USD 2.99
- Remove ADS USD 4.99
- Remove ADS monthly USD 0.99
- Copyright
- © zhirnov.zsystems